Thumbs up - I'll be 70 this year.
Can’t burn anything but hardwood in our $4,000 fireplace furnace that heats our 5,000 sq.ft. log home. Even at lowest setting non-hardwoods would overheat and burn way too fast.
My saws are a 20 year old 16” Stihl 021 and 3 year old 24” Husqvarna 460 Rancher (60.3cc, 3.6hp) that I got to replace my old workhorse, commercial-grade Husqvarna 359 (59cc, 3.9hp) that was destroyed in a freak accident that made me sick. The 460 is a slightly larger engine, and seems as powerful as the 359, but don’t think it is commercial grade like the 359 was.
I use a Dremel to sharpen my own chains.